Bluezorro, I trust you were typing tongue in cheek. Helicopters may be exciting (for some adults as well as children) but an Air Ambulance is not really put on for the benefit of spectators. There are enough organised pleasure flights in the Peak District - one planned for Mother's Day from a pub between Hayfield and Glossop springs to mind. Take him to see that (you don't have to book him a flight but I imagine you'd be the best grandparent in the whole wide world, ever, if you did :-)...